#include "SWM320.h"

void SerialInit(void);
void PWMSignal(void);

int main(void)
{	
	uint32_t i;
	
	SystemInit();
	
	SerialInit();
	
	PWMSignal();	// 产生PWM被测信号
	
	PORT_Init(PORTA, PIN5, FUNMUX1_PULSE_IN, 1);
	Pulse_Init(PULSE_HIGH, 0);		//测量PA5引脚上的高脉冲宽度
	
	while(1==1)
	{
		Pulse_Start();
		while(Pulse_Done() == 0);
		printf("%d\r\n", TIMRG->PCVAL);
		
		for(i = 0; i < 5000000; i++) __NOP();
	}
}


void PWMSignal(void)
{
	PWM_InitStructure  PWM_initStruct;
	
	PWM_initStruct.clk_div = PWM_CLKDIV_8;		//F_PWM = 40M/8 = 5M
	
	PWM_initStruct.mode = PWM_MODE_INDEP;		//A路和B路独立输出					
	PWM_initStruct.cycleA = 50000;				//   5M/50000 = 100Hz			
	PWM_initStruct.hdutyA = 25000;				//25000/50000 = 50%
	PWM_initStruct.initLevelA = 1;
	PWM_initStruct.cycleB = 50000;
	PWM_initStruct.hdutyB = 20000;
	PWM_initStruct.initLevelB = 1;
	PWM_initStruct.HEndAIEn = 0;
	PWM_initStruct.NCycleAIEn = 0;
	PWM_initStruct.HEndBIEn = 0;
	PWM_initStruct.NCycleBIEn = 0;
	
	PWM_Init(PWM0, &PWM_initStruct);
	
	PORT_Init(PORTA, PIN4, FUNMUX0_PWM0A_OUT, 0);
	PORT_Init(PORTA, PIN6, FUNMUX0_PWM0B_OUT, 0);
	
	PWM_Start(PWM0, 1, 1);
}


void SerialInit(void)
{
	UART_InitStructure UART_initStruct;
	
	PORT_Init(PORTA, PIN2, FUNMUX0_UART0_RXD, 1);	//GPIOA.2配置为UART0输入引脚
	PORT_Init(PORTA, PIN3, FUNMUX1_UART0_TXD, 0);	//GPIOA.3配置为UART0输出引脚
 	
 	UART_initStruct.Baudrate = 57600;
	UART_initStruct.DataBits = UART_DATA_8BIT;
	UART_initStruct.Parity = UART_PARITY_NONE;
	UART_initStruct.StopBits = UART_STOP_1BIT;
	UART_initStruct.RXThresholdIEn = 0;
	UART_initStruct.TXThresholdIEn = 0;
	UART_initStruct.TimeoutIEn = 0;
 	UART_Init(UART0, &UART_initStruct);
	UART_Open(UART0);
}


/****************************************************************************************************************************************** 
* 函数名称: fputc()
* 功能说明: printf()使用此函数完成实际的串口打印动作
* 输    入: int ch		要打印的字符
*			FILE *f		文件句柄
* 输    出: 无
* 注意事项: 无
******************************************************************************************************************************************/
int fputc(int ch, FILE *f)
{
	UART_WriteByte(UART0, ch);
	
	while(UART_IsTXBusy(UART0));
 	
	return ch;
}